Washington is located in Tazewell county Illinois with a geographic area of 8.5 square miles. The total population in Washington is 16,555 with 47.4% male and 52.6% female. Children under age 5 represent 7.1% of the population, under age 18 equal 29.6% of the population and over age 65 is 15.9% of the population. The median household income is $78,608, per capita income is $35,946. There are a total of 6,283 housing units with 79.1% owner occupied. Education includes 20.5% of residents that are high school graduates and 44.6% with a bachelor's degree or higher. The average temperature in Washington in the summer is 73 degrees, and in the winter 27 degrees.
